Error
Error Code:
4238
SAP S/4HANA Error 4238: Duplicate Issuer Provider
Description
This error indicates that an attempt was made to register an identity or service provider with an issuer ID that is already in use within the SAP S/4HANA system. It typically occurs during configuration of trust relationships or single sign-on (SSO) settings, preventing the creation of a new or modified provider.
Error Message
ERR_PROVIDER_DUPLICATE_ISSUER
Known Causes
3 known causesAccidental Re-registration
An administrator or automated process attempted to add an identity or service provider using an issuer ID that is already configured in the system.
Configuration Migration Error
During system migration, upgrade, or transport, existing provider configurations might have been duplicated or incorrectly imported.
Manual Configuration Mistake
A user manually entered an issuer ID that matches an existing provider during the setup of a new trust relationship or security setting.
Solutions
3 solutions available1. Identify and Remove Duplicate Issuer Entries in Identity Provider Configuration medium
Locates and removes duplicate entries for the same issuer in the SAP S/4HANA identity provider configuration.
1
Access the SAP S/4HANA system's Identity Provider configuration. This is typically done through transaction `SAML2` or by navigating to `SAP NetWeaver -> Application Server -> ABAP -> Client/Server -> Security -> Trust Management -> Identity Providers` in the SAP GUI.
2
Review the list of configured identity providers. Look for entries that have the exact same 'Issuer' value. The 'Issuer' is the unique identifier for the identity provider.
3
For each duplicate issuer entry, carefully compare the configuration details (e.g., signing certificate, endpoint URLs, user ID mapping). Determine which entry is the correct or preferred one.
4
Delete the redundant or incorrect duplicate issuer entry. Ensure you have a backup of your security configuration before proceeding with deletions.
5
Save the changes and test the SAML SSO configuration to ensure the error is resolved and users can authenticate successfully.
2. Review and Correct Identity Provider Metadata Import medium
Ensures that identity provider metadata is imported correctly and without introducing duplicate issuers.
1
If the identity provider was configured by importing metadata (e.g., an XML file), re-examine the metadata file for any inconsistencies or duplicate entries for the issuer.
2
If duplicates are found in the metadata, edit the XML file to remove the redundant issuer entry, ensuring only one entry per issuer exists.
<EntityDescriptor entityID="https://my.idp.com/entityid">
<IDPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
...
</IDPSSODescriptor>
</EntityDescriptor>3
In the SAP S/4HANA system, remove the existing (potentially incorrectly configured) identity provider entry that corresponds to the duplicate issuer.
4
Re-import the corrected identity provider metadata. Navigate to `SAML2` and select the option to import metadata.
5
Verify that the identity provider is now correctly registered with a unique issuer and test the SAML SSO functionality.
3. Consult Identity Provider Administrator for Issuer Uniqueness easy
Collaborates with the external identity provider administrator to ensure the issuer is unique from their end.
1
Contact the administrator of the external identity provider (e.g., Azure AD, Okta, ADFS).
2
Explain the 'Duplicate Issuer Provider' error (ERR_PROVIDER_DUPLICATE_ISSUER) encountered in SAP S/4HANA.
3
Request that they verify the configuration on their end to ensure that the issuer identifier being sent to SAP S/4HANA is unique and not being duplicated for any reason.
4
If they identify a configuration issue on their side, have them correct it and provide you with updated metadata or configuration details if necessary.
5
Once the external identity provider is confirmed to be sending a unique issuer, re-apply or re-import the configuration in SAP S/4HANA and test.